Abstract: Provided is an austenitic stainless steel weld joint that is excellent in polythionic acid SCC resistance and naphthenic acid corrosion resistance, and is also excellent in creep ductility. An austenitic stainless steel weld joint includes a base material and a weld metal. The weld metal has a chemical composition at its width-center position and at its thickness-center position consisting of, in mass %, C: 0.050% or less, Si: 0.01 to 1.00%, Mn: 0.01 to 3.00%, P: 0.030% or less, S: 0.015% or less, Cr: 15.0 to 25.0%, Ni: 20.0 to 70.0%, Mo: 1.30 to 10.00%, Nb: 0.05 to 3.00%, N: 0.150% or less, and B: 0.0050% or less, with the balance: Fe and impurities.

Abstract: An electrode in which the metallurgical structure of the active surface includes incoherent chromium precipitates, more than 90% of which have a surface of projection of less than 1 ?m2, the incoherent chromium precipitates having a size at least between 10 and 50 nm. The electrode further has a fibrous structure that is visible in a cross-section of the active surface of the electrode following surfacing and chemical etching. The fibrous structure includes a plurality of radial fibers having a thickness of less than 1 mm and of a substantially central fiberless region that has a diameter of less than 3 mm. The electrical conductivity of the electrode is greater than 85% IUPAC. The method for obtaining the electrode in a continuous casting process as well as to a use of the electrode in a resistive spot welding process.

Abstract: Weld metals and methods for welding ferritic steels are provided. The weld metals have high strength and high ductile tearing resistance and are suitable for use in strain based pipelines. The weld metal contains retained austenite and has a cellular microstructure with cell walls containing lath martensite and cell interiors containing degenerate upper bainite. The weld metals are comprised of between 0.02 and 0.12 wt % carbon, between 7.50 and 14.50 wt % nickel, not greater than about 1.00 wt % manganese, not greater than about 0.30 wt % silicon, not greater than about 150 ppm oxygen, not greater than about 100 ppm sulfur, not greater than about 75 ppm phosphorus, and the balance essentially iron. Other elements may be added to enhance the properties of the weld metal. The weld metals are applied using a power source with current waveform control which produces a smooth, controlled welding arc and weld pool in the absence of CO2 or oxygen in the shielding gas.

Abstract: The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). In one embodiment, a tubular welding wire includes a sheath and a core. Further, the core includes a carbon source and an agglomerate having a Group I or Group II compound, silicon dioxide, and titanium dioxide. Additionally, the carbon source and the agglomerate together comprise less than 10% of the core by weight.

Abstract: Provided is a welding metal in which the chemical component composition thereof is appropriately controlled; an A value that is specified by a predetermined relational expression satisfies the requirement of being 3.8% to 9.0%; an X value that is specified by a predetermined relational expression satisfies the requirement of being 0.5% or greater; the area percentage of carbide particles having a circle-equivalent diameter of 0.20 ?m or greater in the welding metal is 4.0% or less; and the number of carbide particles having a circle-equivalent diameter of 1.0 ?m or greater is 1000 particles/mm2 or less. This welding metal, which can exhibit not only high strength but also good low-temperature toughness and good drop-weight characteristics, is useful as a material for a pressure vessel in a nuclear power plant.

Abstract: Methods for forming an aluminum weld on an aluminum work surface are disclosed. The methods include providing an aluminum metal-core wire having a sheath with an outer surface and a core composition within the sheath, applying a voltage to the aluminum metal-core wire in the vicinity of the aluminum work surface to generate an arc, and melting the wire and the work surface to form the weld. The sheath is formed with an inorganic lubricant on its outer surface and the core composition includes metal powders, metal alloy powders, or combinations thereof and less than about 5% of non-metallic components or non-metallic agents based on the weight of the wire.

Abstract: A class of nickel based alloys having a fine grain structure resistant to stress corrosion cracking, and methods of alloy design to produce further alloys within the class are presented. The alloys act as suitable welding materials in similar applications to that of Alloy 622. The fine-grained structure of these novel alloys may also be advantageous for other reasons as well such as wear, impact, abrasion, corrosion, etc. These alloys have similar phases to Alloy 622 in that they are composed primarily of austenitic nickel, however the phase morphology is a much finer grained structure opposed to the long dendritic grains common to Alloy 622 when it is subject to cooling rates from a liquid state inherent to the welding process.

Abstract: A method of depositing a corrosion resistant material via a plasma transferred wire arc (PTWA) thermal spray method on the cylinder surface of heavy duty diesel internal combustion engines. The PTWA process uses a stainless steel hollow core wire that is filled with a metal oxide or carbide powder. The powder can be 100% chromium carbide.

Abstract: Provided is a welding metal in which a predetermined chemical component composition is satisfied, the A value as specified by formula (1) is 3.8% to 9.0%, and the surface area percentage of carbide having a circle-equivalent diameter of 0.20 ?m or greater in the welding metal is 4.0% or less. A value=0.8×[C]?0.05×[Si]+0.5×[Mn]+0.5×[Cu]+[Ni]?0.5×[Mo]+0.2×[Cr]??(1) (Provided that [C], [Si], [Mn], [Cu], [Ni], [Mo] and [Cr] are the C, Si, Mn, Cu, Ni, Mo and Cr content (by mass percent), respectively) The welding metal is useful as a material for a pressure vessel of a nuclear power plant as the welding metal is high in strength and has good low-temperature toughness and drop-weight characteristics.

Abstract: The present disclosure relates generally to welding alloys and, more specifically, to welding consumables (e.g., welding wires and rods) for arc welding operations. In an embodiment, a welding consumable includes less than approximately 1 wt % manganese as well as one or more strengthening agents selected from the group: nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron. The welding consumable also includes one or more grain control agents selected from the group: niobium, tantalum, titanium, zirconium, and boron, wherein the welding consumable includes less than approximately 0.6 wt % grain control agents. Additionally, the welding consumable has a carbon equivalence (CE) value that is less than approximately 0.23. The welding consumable is designed to provide a manganese fume generation rate that is less than approximately 0.01 grams per minute during a welding operation.

Abstract: The present disclosure relates generally to welding alloys and, more specifically, to welding consumables (e.g., welding wires and rods) for welding, such as Gas Metal Arc Welding (GMAW), Gas Tungsten Arc Welding (GTAW), Shielded Metal Arc Welding (SMAW), and Flux Core Arc Welding (FCAW). In an embodiment, a welding alloy includes less than approximately 1 wt % manganese as well as one or more strengthening agents selected from the group: nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron. Additionally, the welding alloy has a carbon equivalence (CE) value that is less than approximately 0.23, according to the Ito and Bessyo carbon equivalence equation. The welding alloy also includes one or more grain control agents selected from the group: niobium, tantalum, titanium, zirconium, and boron, wherein the welding alloy includes less than approximately 0.6 wt % grain control agents.

Abstract: The present invention provides flux cored wire for welding duplex stainless steel which refines the solidified crystal grains for obtaining weld metal superior in toughness and ductility, characterized by containing, as the chemical ingredients included in the steel sheath and flux, by mass % with respect to the mass of the wire as a whole, C: 0.001 to 0.1%, Si: 0.01 to 1.0%, Mn: 2.0 to 6.0%, Cr: 17.0 to 27.0%, Ni: 1.0 to 10.0%, Mo: 0.1 to 3.0%, Al: 0.002 to 0.05%, Mg: 0.0005 to 0.01%, Ti: 0.001 to 0.5%, and N: 0.10 to 0.30%, further limiting P to 0.03% or less and S to 0.01% or less, satisfying 0.73×Cr equivalents?Ni equivalents?4.0 and Ti (mass %)×N (mass %)?0.0004, and having a balance of iron and unavoidable impurities.

Abstract: There is provided a welding material used for welding of SUS310 stainless steel base metal that contains at least one of Nb and V and is excellent in intergranular corrosion resistance, the chemical composition of the welding material consisting, by mass percent, of C: 0.02% or less, Si: 2% or less, Mn: 2% or less, Cr: 26 to 50%, N: 0.15% or less, P: 0.02% or less, S: 0.002% or less, and Ni: a content percentage satisfying [5?Ni?Cr?14], and the balance of Fe and impurities. Also, there is provided a welding joint of an austenitic stainless steel, which consists of the base metal and a weld metal formed by using the welding material.

Abstract: Various embodiments of a metal cored wires and methods are disclosed. In one embodiment of the present invention, a metal cored wire comprises a metal sheath and a metal-powder core material comprising manganese particles. The manganese particles are coated with a coating material to reduce the manganese fumes and exposure during welding.

Abstract: Weld deposit compositions with improved abrasion and corrosion resistance are provided by balancing percent weights of Chromium (Cr), Titanium (Ti), Niobium (Nb), and Boron (B) to allow the Chromium content of the weld matrix to be minimally reduced during carbide formation. The result is an enriched Chromium matrix that has excellent corrosion resistance in combination with highly abrasion resistant dispersed carbides.

Abstract: A method produces a welded connection between first and second components each having inner and outer sides interconnected by an end face. The first component has a ferritic basic body carrying a plating at the inside and having an end face with a buffer layer of Ni-based alloy. The second component is of austenitic material. The end faces of the components enclose a weld groove. An austenitic root, connecting the plating to the end face of the second component, is welded in the weld groove. An intermediate layer of a nickel alloy having at least 90% nickel is welded onto the root. The intermediate layer is connected to the end faces of the plating and the second component. A weld seam is then produced in the remaining weld groove using a nickel-based welding additive. A method for repairing a welded connection between first and second components is also provided.

Abstract: Various embodiments of a metal cored wires, hardband alloys, and methods are disclosed. In one embodiment of the present invention, a hardbanding wire comprises from about from about 16% to about 30% by weight chromium; from about 4% to about 10% by weight nickel; from about 0.05% to about 0.8% by weight nitrogen; from about 1% to about 4% by weight manganese; from about 1% to about 4% by weight carbon from about 0.5% to about 5% by weight molybdenum; from about 0.25% to about 2% by weight silicon; and the remainder is iron including trace elements. The hardband alloy produced by the metal cored wire meets API magnetic permeability specifications and has improved metal to metal, adhesive wear resistance compared to conventional hardband alloys.

Abstract: A welding system is disclosed for performing a short arc welding process between an advancing wire electrode and a workpiece. The system comprises a power source with a controller for creating a current pulse introducing energy into the electrode to melt the end of the electrode and a low current quiescent metal transfer section following the end of the melting pulse during which the melted electrode short circuits against the workpiece; a timer to measure the actual time between the end of the pulse and the short circuit; a device for setting a desired time from the pulse to the short circuit; a circuit to create a corrective signal based upon the difference between the actual time and the desired time; and, a circuit responsive to the corrective signal to control a given parameter of the current pulse. Also disclosed is a strategy for arc welding utilizing a cored electrode that produces welds with low levels of contaminants and which are strong, tough, and durable.

Abstract: A cored electrode having reduced moisture pick-up properties and which forms a weld bead with low diffusible hydrogen in a gas shielded electric arc welding process. The cored electrode includes a metal sheath and a fill composition. The fill composition includes titanium dioxide, slag forming agent and a sodium-silica-titanate compound.

Abstract: An electron-beam welded joint including, by mass %, C: 0.02% to 0.1%, Si: 0.03% to 0.30%, Mn: 1.5% to 2.5%, Ti: 0.005 to 0.015%, N: 0.0020 to 0.0060%, O: 0.0010% to 0.0035%, Nb: 0% to 0.020%, V: 0% to 0.030%, Cr: 0% to 0.50%, Mo: 0% to 0.50%, Cu: 0% to 0.25%, Ni: 0% to 0.50%, B: 0% to 0.0030%, S: limited to 0.010% or less, P: limited to 0.015% or less, Al: limited to 0.004% or less, and a balance consisting of iron and unavoidable impurities, wherein an index value CeEB is 0.49% to 0.60%, a number of oxides having an equivalent circle diameter of 1.0 ?m or more is 20 pieces/mm2 or less, and a number of oxides having an equivalent circle diameter of 0.05 ?m or more and less than 0.5 ?m is 1×103 pieces/mm2 to 1×105 pieces/mm2 at a thickness center portion.

Abstract: A weld metal contains Cr: 28.0% to 31.5% by mass, Fe: 7.0% to 11.0% by mass, Nb and Ta: 1.5% to 2.5% by mass in total, C: 0.015% to 0.040% by mass, Mn: 0.5% to 4.0% by mass, N: 0.005% to 0.080% by mass, Si: 0.70% by mass or less (and more than 0%), Al: 0.50% by mass or less, Ti: 0.50% by mass or less, Mo: 0.50% by mass or less, Cu: 0.50% by mass or less, B: 0.0010% by mass or less, Zr: 0.0010% by mass or less, Co: 0.10% by mass or less, P: 0.015% by mass or less, and S: 0.015% by mass or less, the remainder being Ni and incidental impurities.

Abstract: Weld deposit compositions with improved crack resistance, improved wear resistance, and improved hardness are provided by controlling matrix grain size and balancing Titanium and/or Niobium with Carbon and/or Boron content. Additionally, the presence of coarse chromium carbides is drastically decreased to reduce the amount of check-cracking. Preferably, the weld deposit is produced from a flux-cored or metal-cored wire. The weld deposit characteristics include a matrix having a fine grain size, small evenly dispersed carbides within the matrix, and a small amount of Carbon in the matrix.

Abstract: Weld metals and methods for welding ferritic steels are provided. The weld metals have high strength and high ductile tearing resistance and are suitable for use in strain based pipelines. The weld metal contains retained austenite and has a cellular microstructure with cell walls containing lath martensite and cell interiors containing degenerate upper bainite. The weld metals are comprised of between 0.02 and 0.12 wt % carbon, between 7.50 and 14.50 wt % nickel, not greater than about 1.00 wt % manganese, not greater than about 0.30 wt % silicon, not greater than about 150 ppm oxygen, not greater than about 100 ppm sulfur, not greater than about 75 ppm phosphorus, and the balance essentially iron. Other elements may be added to enhance the properties of the weld metal. The weld metals are applied using a power source with current waveform control which produces a smooth, controlled welding arc and weld pool in the absence of CO2 or oxygen in the shielding gas.

Abstract: To provide weld metal that has a high strength and toughness in the as-welded condition or in the annealed condition. The weld metal of the present invention contains by weight %, C: 0.04-0.15%, Si: 0.50% or less, Mn: 1.0-1.9%, Ni: 1.0-4.0%, Cr: 0.10-1.0%, Mo: 0.20 to 1.2%, Ti: 0.010-0.060%, Al: 0.030% or less, O: 0.15-0.060%, N: 0.010% or less, Fe and inevitable impurities as the remaining contents. The weld metal is further characterized by the fact that the ratio of Ti content (%) to Si content (%) i.e., [compound type Ti]/[compound type Si] is more than 1.5, and the number A defined by the following formula is 0.50 or more, wherein A=[Ti]/([O]?1.1×[Al]+0.05×[Si]).

Abstract: An alloy for use as a welding overlay for boiler tubes in a low NOx coal-fired boiler comprising in % by weight: 36 to 43% Cr, 0.2 to 5.0% Fe, 0-2.0% Nb, 0-1% Mo, 0.3 to 1% Ti, 0.5 to 2% Al, 0.005 to 0.05% C, 0.005 to 0.020% (Mg+Ca), 0-1% Mn, 0-0.5% Si, less than 0.01% S, balance substantially Ni and trace additions and impurities. The alloy provides exceptional coal ash corrosion resistance in low partial pressures of oxygen. The alloy also increases in hardness and in thermal conductivity at service temperature over time. The increased hardness improves erosion resistance of the tubes while the increased thermal conductivity improves the thermal efficiency of the boiler and its power generation capabilities.

Abstract: Provided is a welding wire and method for manufacturing a welding wire providing for quality welds on 300 series stainless steel and similar materials. A metal powder core is encapsulated in a metal sheath. The metal sheath composition comprising up to about 6% nickel, by weight, and may correspond to a series 400 stainless steel. A combination of the metal sheath and the metal powder core provides an overall alloy content of a series 300 stainless steel.

Abstract: Disclosed herein are iron-based alloys having a microstructure comprising a fine-grained ferritic matrix and having a 60+ Rockwell C surface, wherein the ferritic matrix comprises <10 ?m Nb and W carbide precipitates. Also disclosed are methods of welding comprising forming a crack free hardbanding weld overlay coating with such an iron-based alloy. Also disclosed are methods of designing an alloy capable of forming a crack free hardbanding weld overlay, the methods comprising the steps of determining an amorphous forming epicenter composition, determining a variant composition having a predetermined change in constituent elements from the amorphous forming epicenter composition, and forming and analyzing an alloy having the variant composition.

Abstract: Disclosed herein are iron-based alloys having a structure comprising fine-grained ferritic matrix and having a 60+ Rockwell C surface, wherein the ferritic matrix comprises <10 ?m Nb and W carbide precipitates. Also disclosed are methods of welding comprising forming a crack free hardbanding weld overlay coating with such an iron-based alloy. Also disclosed are methods of designing an alloy capable of forming a crack free hardbanding weld overlay, the methods comprising the step determining an amorphous forming epicenter composition, determining a variant composition having a predetermined change in constituent elements from the amorphous forming epicenter composition, and forming and analyzing an alloy having the variant composition.

Abstract: This disclosure provides a joining area and method between copper and stainless steel or titanium, as well as the permanent cathode obtained, where said joining area is made of a first zone of a copper-nickel (Cu—Ni) alloy, an intermediate zone with a mostly nickel alloy or pure nickel and a second zone made of a stainless steel-nickel alloy, which is the result of the participating materials being cast in an arc welding process, for example TIG, MIG or manual arc using electrodes of nickel as welding contributor between said materials and their space arrangement, that is to say, leaving a separation between the materials when performing the welding process, thus ensuring as follows: a) greater tensile strength, b) a substantial improvement of corrosion resistance of the joint welding, and c) improvement of conductibility, which can be improved still further by modifying the straight design of the conducting bar by providing it with the “horn”-type shape.

Abstract: A method for producing superalloy weld wire and weld wire having fewer inclusions, and specifically fewer hafnia inclusions, and superalloy weld wire, particularly hafnium-containing superalloy weld wire, produced by this method. The method includes producing directionally solidified cast rod in a diameter of less than about ½ inch. The rod preferably is produced by investment casting or by continuous casting. The directional solidification process results in rod having inclusions such as oxides and dirt segregated into portions of the casting where they are easily removed. The cast rod can then be formed into semi-finished weld wire using a single extrusion step, followed by grinding to the final required diameter.

Abstract: An object of the present invention is to provide a Ni base alloy solid wire for welding, which has excellent cracking resistance to ductility dip cracking in weld metal, can increase the tensile strength of the weld metal to not less than the tensile strength of the base material, and has excellent weldability. The present invention provides a solid wire which has a composition containing Cr: 27.0 to 31.5 mass %, Ti: 0.50 to 0.90 mass %, Nb: 0.40 to 0.70 mass %, Ta: 0.10 to 0.30 mass %, C: 0.010 to 0.030 mass %, and Fe: 5.0 to 11.0 mass %, and is regulated to Al: 0.10 mass % or less, N: 0.020 mass % or less, Zr 0.005 mass % or less, P:0.010 mass % or less, S: 0.0050 mass % or less, Si: 0.50 mass % or less, and Mn: 1.00 mass % or less, with the balance including Ni and inevitable impurities.

Abstract: A stainless steel wire having a flux core for welding zinc-based alloy coated steel sheet having an outer metal sheath coating a core of flux wherein in total having in mass (%) as percentage to the total mass of the wire: C: 0.01-0.05%, Si: 0.1-1.5%, Mn: 0.5-3.0%, Ni: 7.0-10.0%, Cr: 26.0-30.0%, wherein an F value defined as a function of the above components ranges from 30 to 50, the flux further having a slag formation agent in mass (%) as percentage to the total mass of the wire: TiO2: 0.6-2.6%, SiO2: 1.8-3.8%, ZrO2: 1.0-3.5%, and optionally Al2O3: 0.1-1.0%, wherein the slag formation agent in total is less than 10%, and the wire further containing Fe and residual impurities.

Abstract: The present invention relates an iron based brazing material comprising an alloy consisting essentially of: 15 to 30 wt % chromium (Cr); 0 to 5.0 wt % manganese (Mn); 15 to 30 wt % nickel (Ni); 1.0 to 12 wt % molybdenum (Mo); 0 to 4.0 wt % copper (Cu); 0 to 1.0 wt % nitrogen (N); 0 to 20 wt % silicone (Si); 0 to 2.0 wt % boron (B); 0 to 16 wt % phosphorus (P); optionally 0.0 to 2.5 wt % of each of one or more of elements selected from the group consisting of carbon (C), vanadium (V), titanium (Ti), tungsten (W), aluminum (Al), niobium (Nb), hafnium (Hf), and tantalum (Ta); the alloy being balanced with Fe, and small inevitable amounts of contaminating elements; and wherein Si, B and P are in amounts effective to lower melting temperature, and Si, B, and P are contained in amounts according to the following formula: Index=wt % P+1.1×wt % Si+3×wt % B, and the value of the Index is within the range of from about 5 wt % to about 20.

Abstract: Welds made in TRIP steel workpieces by non-autogenous welding techniques can be made to approximate both the composition and microstructure of the TRIP steel being welded by formulating the weld to have controlled amounts of ? phase (austenite) stabilizers and cementite suppressors.

Abstract: A method produces a welded connection between first and second components each having inner and outer sides interconnected by an end face. The first component has a ferritic basic body carrying a plating at the inside and having an end face with a buffer layer of Ni-based alloy. The second component is of austenitic material. The end faces of the components enclose a weld groove. An austenitic root, connecting the plating to the end face of the second component, is welded in the weld groove. An intermediate layer of a nickel alloy having at least 90% nickel is welded onto the root. The intermediate layer is connected to the end faces of the plating and the second component. A weld seam is then produced in the remaining weld groove using a nickel-based welding additive. A method for repairing a welded connection between first and second components is also provided.

Abstract: The invention relates to an auxiliary material for soldering steel sheets, wherein the auxiliary material comprises weight percentages of 15 to 40% Zn, 5 to 30% Mn, 0.01 to 10% Ni, and typical impurities no greater than 1%, and the remainder Cu.

Abstract: A nickel, chromium, iron alloy and method for use in producing weld deposits and weldments formed therefrom. The alloy comprises, in weight percent, about 28.5 to 31.0% chromium; about 0 to 16% iron; less than about 1.0% manganese; about 2.1 to 4.0% niobium plus tantalum; 1.0 to 6.5% molybdenum; less than 0.50% silicon; 0.01 to 0.35% titanium; 0 to 0.25% aluminum; less than 1.0% copper; less than 1.0% tungsten; less than 0.5% cobalt; less than about 0.10% zirconium; less than about 0.01% sulfur; less than 0.01% boron; less than 0.03% carbon; less than about 0.02% phosphorous; 0.002 to 0.015% magnesium plus calcium; and balance nickel and incidental impurities. The method includes the steps of forming a welding electrode from the above alloy composition and melting the electrode to form a weld deposit. A preferred weldment may be in the form of a tubesheet of a nuclear reactor.

Abstract: A cored electrode to form a high manganese metal deposition that includes at least about 4 weight percent manganese and at least about 10 weight percent chromium which is useful in joining dissimilar metals and/or for depositing buffer layers on carbon steel and/or low alloy steels.

Abstract: A low alloy or mild steel weld containing a slag-modifying additive selected from the group consisting of antimony, bismuth, germanium and compounds thereof; A weld wire for forming a low alloy or mild steel weld containing a slag-modifying additive selected from the group consisting of antimony, bismuth, germanium and compounds thereof.

Abstract: A flux cored wire for duplex stainless steel and a manufacturing method thereof are provided. The flux cored wire can include a sheath and a flux filled into the sheath. The flux cored wire comprises about 24.0-30.0 wt % Cr, about 7.0-10.5 wt % Ni, about 2.0-4.0 wt % Mo, about 0.10-2.50 wt % Cu, about 0.40-1.00 wt % Si, about 1.5-3.0 wt % Mn, about 0.10-0.30 wt % N compound (converted value of N), and the remainder including Fe and inevitable impurities on the basis of the total weight of the wire. The flux comprises about 6.50-12.00 wt % of TiO2+SiO2+ZrO2+Al2O3, about 0.10-0.50 wt % of Li2O+K2O+Na2O, about 0.10-2.00 wt % of the other oxides, and about 0.10-0.50 wt % of metal fluoride (converted value of F) on the basis of the total weight of the wire. The flux can be filled into the sheath at a ratio of about 26-35%.

Abstract: An austenitic stainless steel welded joint, whose base metal and weld metal each comprises, by mass percent, C: not more than 0.3%, Si: not more than 2%, Mn: 0.01 to 3.0%, P: more than 0.04% to not more than 0.3%, S: not more than 0.03%, Cr: 12 to 30%, Ni: 6 to 55%, rare earth metal(s): more than 0.2% to not more than 0.6%, sol. Al: 0.001 to 3% and N: not more than 0.3%, with the balance being Fe and impurities, and satisfies the formula of (Cr+1.5×Si+2×P)/(Ni+0.31×Mn+22×C+14.2×N+5×P)<1.388, in spite of having a high P content and showing the fully austenitic solidification, has excellent resistance to the weld solidification cracking. Therefore, the said austenitic stainless steel welded joint can be widely used in such fields where a welding fabrication is required. Each element symbol in the above formula represents the content by mass percent of the element concerned.

Abstract: A low alloy or mild steel weld containing a slag-modifying additive selected from the group consisting of antimony, bismuth, germanium and compounds thereof; A weld wire for forming a low alloy or mild steel weld containing a slag-modifying additive selected from the group consisting of antimony, bismuth, germanium and compounds thereof.

Abstract: A hard composite composition comprises a binder; and a polymodal blend of matrix powder. In an embodiment, the polymodal blend of matrix powder has at least one local maxima at a particle size of 30 ?m or less, at least one local maxima at a particle size of 200 ?m or more, and at least one local minima between a particle size of about 30 ?m to about 200 ?m that has a value that is less than the local maxima at a particle size of 30 ?m or less.

Abstract: A solid wire contains C of 0.020 to 0.100 mass percent, Si of 0.25 to 1.10 mass percent, Mn of 1.20 to 1.65 mass percent, P of 0.008 to 0.017 mass percent, S of 0.045 to 0.150 mass percent, O of 0.0050 mass percent or less, N of 0.0050 mass percent or less, wherein P*(O+N)*105?15 is satisfied, and the remainder including Fe and impurities, wherein the relevant impurities contain Ti of 0.15 mass percent or less, B of 0.0050 mass percent or less, and Cr, Ni, Al, Nb, V, Zr, La and Ce of 0.20 mass percent or less respectively. According to such a configuration, a solid wire is provided, in which while increase in welding cost is controlled to the minimum, stability of wire feed, burn-through resistance, undercut resistance, and crack resistance are excellent, slag and spatter are hardly produced, hardness of weld metal is equal to or higher than that of base metal, and brittle fracture hardly occurs.

Abstract: A method of AC welding that includes the step of supplying AC current with a given waveform from a power source to an advancing electrode and workpiece. The AC current is used to melt the electrode and to thereby deposit metal from the electrode onto the workpiece. The electrode includes a particulate arc stabilizing compound. The particulate arc stabilizing compound includes sodium and titanium dioxide. The particulate arc stabilizing compound constitutes over 20% by weight of the core of the electrode.

Abstract: Disclosed is a welding wire for joining cast iron and stainless steel, having a composition of 0.03 wt % or less of C, 2.0˜3.0 wt % of Si, 12.0˜14.0 wt % of Mn, 7.0˜9.0 wt % of Cr, 45.0˜47.0 wt % of Ni, 0.5˜0.8 wt % of Nb, and 2.0˜3.0 wt % of Mo, with a balance of Fe. Using the welding wire, a weld zone which has no hot cracks and is sound and good can be obtained.

Abstract: Various slag systems exhibiting improved flow characteristics and weld puddle properties are provided. Also provided are flux cored electrodes for producing the noted slag systems and related methods of arc welding.

Abstract: A cored reactive metal wire is formed by gathering at least three strands of continuously fed elongated reactive metal wires into a bundle and aligning the bundle of wires with a continuously fed sheet of metal sheath. The bundle of wires is then compacted into a generally cylindrical shape and clad with the sheet of metal sheath whereby the compacted bundle of reactive metal wires form a core of the cored wire in which the core has a substantially larger diameter than each of the strands of continuously fed elongated reactive metal wires.

Abstract: Patent of Invention for PROCESS CAPILLARY ELECTRIC WELDING OF LOW AND HIGH ALLOY STEELS, HARDENED OR NOT, AND BI-METALS, FOR THE OBTAINMENT OF A DETERMINED TEXTURE, WITHOUT THERMAL TREATMENT, in which the first layer (1) is used to line the bevel and its root with electrodes of crystallization of the deposited welding material, said weld being adequate for the obtainment of the austenitic plus ferretic texture. With the second layer (2), proceed with the filling of the bevel with the crystallization of the deposited weld, obtaining a perlitic or pearlitic plus troostitic texture, while in the third and fifth layers (3, 5), the electrode for the obtainment of an austenitic plus ferritic texture. In the fourth layer (4), the electrode of deposited weld crystallization for the obtainment of a sorbitic plus bainitic texture is used, and in the sixth layer (6), an electrode for deposited weld crystallization for the obtainment of a bainitic texture is used.

Abstract: A chromium-free welding consumable and a method of welding stainless steel to reduce the presence of chromium emissions. The consumable is made from an alloy that reduces the emission of chromium during a welding process, and include predominantly nickel, with between approximately five and twenty five percent by weight copper, up to approximately five percent by weight of palladium, up to approximately ten percent by weight of molybdenum and up to five percent non-copper alloying ingredients. Welding consumables made from the alloy are particularly well-suited for welding austenitic stainless steels, such as type 304 stainless steel. The method involves using chromium-free weld filler material with a stainless steel base material.